Electric door-opener



(No Model.)

L. BATES. ELECTRIC DOOR OPENER.

Patented Mar. 10, 1891.

IWL

UNITED STATES PATENT OFFICE.

LOUIS BATES, OF JERSEY CITY, NEV JERSEY.

ELECTRIC DOOR-O PEN ER.

SPECIFICATION forming part of Letters Patent No. 448,110, dated March 10, 1891.

Application iiled July 14,1890. Serial No. 358,596. (No model.)

To a/ZZ whom, t may concern:

Be it known that I, LOUIS BATES, of Jersey City, in the county of Hudson and State of New Jersey, have invented a new and Improved Electric Door-Opener, of which the following is a full, clear, and exact description.

The object of my invention is to improve the efficiency of that class of electric dooropeners wherein a pivoted latch is employed, which is held in closed position by a pawl which is pressed forward by a spring and adapted to be forced out of engagement with the pivoted latch by an armature controlled by electro-magnets; and to this end my invention consists of the construction, arrangement, and combination of parts, all as hereinafter described and claimed.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the gures.

Figure l is a front view of my newand improved electric door-opener. Fig. 2 is a side elevation of the same. Fig. 3 is a sectional plan on line a: x of Fig. 2, showing` the locking-pawl engaged with the latch; and Fig. 4c is a similar view showing the locking-pawl detached from the latch.

A represents the casing of the door-opener,

in an opening A of which is placed the latchv B, pivoted on the pin B and acted upon by the spring B2, the end Z) of which presses against the extension b of thelatch, as shown clearly in Fig. 3, to normally hold the latch pressed forward to retain the bolt M of the door, as shown in Fig. 4. The end of the extension b is notched, as shown at b3, to receive Ithe locking-pawl C. This is pivoted on the pin C and is acted upon by the heavy coiled spring O2, which normally holds the pawl in engagement with the notch b3 for locking the latch B in its forward position, as shown in Fig. 3. Attached to the locking-pawl is the extension or arm O3, which reaches forward nearly to the front of the frame A.

D D are the electro-magnets mounted on the plate D', held in the trame by tho screw d, and E is the vibratory armature pivoted on the pin e, acted on bythe heavy coiled spring c', provided with the spring e2, and at one end with the hammer e3, arranged to deliver its strokes upon the end of the extension or arm O3 of the locking-pawl. One terminal f of the circuit is attached to the binding-post f', while the other is attached to the screw f2, the inner end of which makes contact with the spring e2, as shown clearly in Fig. 2. By this arrangement when the circuit is closed the armature is rapidly Vibrated, which causes the hammer e5 to deliver rapid blows upon the arm or extension O3, which forces the pawl from the position shown in Fig. 3 to that shown in Fig. 4f, releasing the latch B, so that pressure upon door M will swing it back and permit the door to open. The circuit being now open, the spring B2 will force the latch forward and spring C2 will force the pawlinto the notch b3, thus locking the latch forward to hold the door when closed again.

As shown in Fig. et, the projecting end of the door-bolt M is beveled, as usual. When the door M closes, such beveled portion of the latch M strikes the correspondingly-beveled latch B and is forced back, thus passing the opposing latch B without disturbing it, and thereby again locking the door.

Having thus described my invention, I claim as new and desire to secure by Letters Patent` The pivoted latch B, actuated by a spring B2 and formed with an extension b', notched at b2, and the locking-pawl O, actuated by a spring C2 and formed with an arm or extension O3, in combination with theelectro-magnet-s D and vibratory armature E, provided with the hammer e3, arranged to operate substantially as described.

LOUIS BATES. 

